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authorSorunome <mail@sorunome.de>2021-06-09 20:39:51 +0200
committerGitHub <noreply@github.com>2021-06-09 19:39:51 +0100
commitd936371b698ea3085472ee83ae9a88ea7832280e (patch)
tree7392154f4697974cd1d1d5f2c3f974c507e51a74 /synapse/rest/client/v2_alpha/knock.py
parentLimit the number of in-flight /keys/query requests from a single device. (#10... (diff)
downloadsynapse-d936371b698ea3085472ee83ae9a88ea7832280e.tar.xz
Implement knock feature (#6739)
This PR aims to implement the knock feature as proposed in https://github.com/matrix-org/matrix-doc/pull/2403

Signed-off-by: Sorunome mail@sorunome.de
Signed-off-by: Andrew Morgan andrewm@element.io
Diffstat (limited to 'synapse/rest/client/v2_alpha/knock.py')
-rw-r--r--synapse/rest/client/v2_alpha/knock.py109
1 files changed, 109 insertions, 0 deletions
diff --git a/synapse/rest/client/v2_alpha/knock.py b/synapse/rest/client/v2_alpha/knock.py
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+++ b/synapse/rest/client/v2_alpha/knock.py
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+# Copyright 2020 Sorunome
+# Copyright 2020 The Matrix.org Foundation C.I.C.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import logging
+from typing import TYPE_CHECKING, Dict, List, Optional, Tuple
+
+from twisted.web.server import Request
+
+from synapse.api.constants import Membership
+from synapse.api.errors import SynapseError
+from synapse.http.servlet import (
+    RestServlet,
+    parse_json_object_from_request,
+    parse_strings_from_args,
+)
+from synapse.http.site import SynapseRequest
+from synapse.logging.opentracing import set_tag
+from synapse.rest.client.transactions import HttpTransactionCache
+from synapse.types import JsonDict, RoomAlias, RoomID
+
+if TYPE_CHECKING:
+    from synapse.app.homeserver import HomeServer
+
+from ._base import client_patterns
+
+logger = logging.getLogger(__name__)
+
+
+class KnockRoomAliasServlet(RestServlet):
+    """
+    POST /xyz.amorgan.knock/{roomIdOrAlias}
+    """
+
+    PATTERNS = client_patterns(
+        "/xyz.amorgan.knock/(?P<room_identifier>[^/]*)", releases=()
+    )
+
+    def __init__(self, hs: "HomeServer"):
+        super().__init__()
+        self.txns = HttpTransactionCache(hs)
+        self.room_member_handler = hs.get_room_member_handler()
+        self.auth = hs.get_auth()
+
+    async def on_POST(
+        self,
+        request: SynapseRequest,
+        room_identifier: str,
+        txn_id: Optional[str] = None,
+    ) -> Tuple[int, JsonDict]:
+        requester = await self.auth.get_user_by_req(request)
+
+        content = parse_json_object_from_request(request)
+        event_content = None
+        if "reason" in content:
+            event_content = {"reason": content["reason"]}
+
+        if RoomID.is_valid(room_identifier):
+            room_id = room_identifier
+
+            # twisted.web.server.Request.args is incorrectly defined as Optional[Any]
+            args: Dict[bytes, List[bytes]] = request.args  # type: ignore
+
+            remote_room_hosts = parse_strings_from_args(
+                args, "server_name", required=False
+            )
+        elif RoomAlias.is_valid(room_identifier):
+            handler = self.room_member_handler
+            room_alias = RoomAlias.from_string(room_identifier)
+            room_id_obj, remote_room_hosts = await handler.lookup_room_alias(room_alias)
+            room_id = room_id_obj.to_string()
+        else:
+            raise SynapseError(
+                400, "%s was not legal room ID or room alias" % (room_identifier,)
+            )
+
+        await self.room_member_handler.update_membership(
+            requester=requester,
+            target=requester.user,
+            room_id=room_id,
+            action=Membership.KNOCK,
+            txn_id=txn_id,
+            third_party_signed=None,
+            remote_room_hosts=remote_room_hosts,
+            content=event_content,
+        )
+
+        return 200, {"room_id": room_id}
+
+    def on_PUT(self, request: Request, room_identifier: str, txn_id: str):
+        set_tag("txn_id", txn_id)
+
+        return self.txns.fetch_or_execute_request(
+            request, self.on_POST, request, room_identifier, txn_id
+        )
+
+
+def register_servlets(hs, http_server):
+    KnockRoomAliasServlet(hs).register(http_server)